QUANTUM CORP /DE/ — SC 13G Filings
56 SC 13G filings on record
This page lists all SC 13G filings submitted to the SEC by QUANTUM CORP /DE/ (QMCO), sorted by most recent first. Each row links to the full filing on EdgarLookup. QUANTUM CORP /DE/ has filed 56 SC 13G documents with the SEC since 2012. To view all SEC filings by QUANTUM CORP /DE/, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
144
15-12G
25-NSE
3
3/A
4
4/A
424B2
424B3
424B5
425
5
8-A12B
8-A12G
8-K
8-K/A
ARS
AW
CERT
CORRESP
D
DEF 14A
DEF 14C
DEFA14A
DEFC14A
DEFR14A
DFAN14A
EFFECT
NT 10-K
NT 10-Q
POS AM
PRE 14A
PRE 14C
PREC14A
PRER14A
PRRN14A
RW
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-I
SC TO-I/A
SCHEDULE 13D
SCHEDULE 13D/A
SCHEDULE 13G/A
SD
SD/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G | SCHEDULE 13G | 0001104659-24-021785 | Feb 13, 2024 | — |
| SC 13G | — | 0001011438-23-000649 | Dec 4, 2023 | — |
| SC 13G | SC 13G | 0001019056-23-000235 | May 11, 2023 | — |
| SC 13G | — | 0000834237-22-009114 | Mar 11, 2022 | — |
| SC 13G | — | 0000834237-22-008397 | Feb 8, 2022 | — |
| SC 13G | QUANTUM CORPORATION | 0000902664-21-005047 | Nov 18, 2021 | — |
| SC 13G | NONE | 0001567619-21-007811 | Apr 8, 2021 | — |
| SC 13G | SC 13G | 0000893739-21-000010 | Jan 29, 2021 | — |
| SC 13G | — | 0000935836-19-000023 | Jan 10, 2019 | — |
| SC 13G | SC 13G | 0001615774-18-015186 | Dec 31, 2018 | — |
| SC 13G | SC 13G | 0001104659-18-072053 | Dec 10, 2018 | — |
| SC 13G | AMENDMENT NO. 1 | 0000905718-18-000237 | Feb 14, 2018 | — |
| SC 13G | SC 13G | 0001104659-18-006110 | Feb 2, 2018 | — |
| SC 13G | — | 0000215457-18-004587 | Feb 1, 2018 | — |
| SC 13G | — | 0001214659-17-006841 | Nov 20, 2017 | — |
| SC 13G | — | 0001011438-16-000531 | Jul 29, 2016 | — |
| SC 13G | — | 0001214659-14-001132 | Feb 13, 2014 | — |
| SC 13G | — | 0000932471-13-004523 | Feb 13, 2013 | — |
| SC 13G | — | 0001086364-13-001395 | Jan 30, 2013 | — |
| SC 13G | DISCLOSURE DOCUMENT | 0000902219-12-000372 | Feb 14, 2012 | — |
| SC 13G | — | 0001086364-12-000617 | Feb 9, 2012 | — |
| SC 13G | — | 0001011438-11-000263 | Aug 15, 2011 | — |
| SC 13G | — | 0001304096-11-000060 | Jun 30, 2011 | — |
| SC 13G | DOC ONE | 0000315066-11-002869 | Feb 14, 2011 | — |
| SC 13G | — | 0001086364-11-003627 | Feb 8, 2011 | — |
| SC 13G | SC 13G | 0001422848-10-000215 | Jul 9, 2010 | — |
| SC 13G | 13G | 0001037389-10-000016 | Feb 11, 2010 | — |
| SC 13G | — | 0001086364-10-008522 | Jan 29, 2010 | — |
| SC 13G | — | 0000905339-08-000018 | Dec 4, 2008 | — |
| SC 13G | SCHEDULE 13G | 0000936392-08-000235 | Mar 28, 2008 | — |
| SC 13G | SCHEDULE 13G | 0000891092-08-001014 | Feb 14, 2008 | — |
| SC 13G | SCHEDULE 13G | 0000891092-07-003592 | Aug 16, 2007 | — |
| SC 13G | — | 0001279042-07-000006 | Jul 27, 2007 | — |
| SC 13G | — | 0001313250-06-000027 | Mar 16, 2006 | — |
| SC 13G | QUANTUM CORP. | 0000357235-06-000241 | Feb 15, 2006 | — |
| SC 13G | — | 0000919574-05-003405 | Oct 6, 2005 | — |
| SC 13G | — | 0000888002-04-000482 | Feb 10, 2004 | — |
| SC 13G | — | 0000909012-03-000808 | Dec 9, 2003 | — |
| SC 13G | — | 0000897226-01-500019 | Jul 11, 2001 | — |
| SC 13G | SCHEDULE 13G | 0000912057-00-052974 | Dec 11, 2000 | — |
| SC 13G | SCHEDULE 13G | 0000888002-00-000268 | Nov 13, 2000 | — |
| SC 13G | SCHEDULE 13G - 11-10-00 - QUANTUM CORPORATION | 0000315066-00-001271 | Nov 13, 2000 | — |
| SC 13G | SC 13G | 0000912057-00-036061 | Aug 10, 2000 | — |
| SC 13G | — | 0000017283-00-000288 | Feb 14, 2000 | — |
| SC 13G | — | 0000068100-00-000126 | Feb 14, 2000 | — |
| SC 13G | — | 0000902219-00-000133 | Feb 11, 2000 | — |
| SC 13G | SCHEDULE 13G - 02-14-00 - QUANTUM CORPORATION | 0000315066-00-000310 | Feb 11, 2000 | — |
| SC 13G | — | 0000889812-00-000490 | Feb 8, 2000 | — |
| SC 13G | — | 0000889812-00-000489 | Feb 8, 2000 | — |
| SC 13G | SCHEDULE 13G | 0000922423-00-000187 | Feb 3, 2000 | — |